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Simple question on snoop's output format

I have a snoop launched with the following command line:

snoop -d bge2 -x54 -ta host 192.168.104.152

but the format is something quite unreadable:


-----------------------------------
         0: 3139 4031 3932 2e31 3638 2e31 3034 2e32    19@192.168.104.2
        16: 3030 3a35 3036 3020 5349 502f 322e 300d    00:5060 SIP/2.0.
        32: 0a43 616c 6c2d 4944 3a20 3230 3833 3533    .Call-ID: 208353
        48: 3165 6537 6138 6533 6236 6266 6135 3565    1ee7a8e3b6bfa55e
        64: 6537 3239 3532 3864 3962 4031 3932 2e31    e729528d9b@192.1
        80: 3638 2e31 3034 2e31 3532 0d0a 4353 6571    68.104.152..CSeq
        96: 3a20 3120 494e 5649 5445 0d0a 4672 6f6d    : 1 INVITE..From
       112: 3a20 3c73 6970 3a54 5031 5f41 5032 4031    : <sip:TP1_AP2@1
       128: 3932 2e31 3638 2e31 3034 2e31 3532 3e3b    92.168.104.152>;
       144: 7461 673d 3132 3334 3536 3738 390d 0a54    tag=123456789..T
       160: 6f3a 203c 7369 703a 3131 3940 3139 322e    o: <sip:119@192.
       176: 3136 382e 3130 342e 3230 303e 0d0a 5669    168.104.200>..Vi
       192: 613a 2053 4950 2f32 2e30 2f55 4450 2031    a: SIP/2.0/UDP 1
       208: 3932 2e31 3638 2e31 3034 2e31 3532 3a35    92.168.104.152:5
       224: 3036 303b 6272 616e 6368 3d7a 3968 4734    060;branch=z9hG4
       240: 624b 3530 3166 6636 6235 6534 3465 3662    bK501ff6b5e44e6b
       256: 6563 3138 6162 6165 3130 6632 3363 3031    ec18abae10f23c01
       272: 3664 0d0a 4d61 782d 466f 7277 6172 6473    6d..Max-Forwards
       288: 3a20 3235 350d 0a43 6f6e 7465 6e74 2d4c    : 255..Content-L
       304: 656e 6774 683a 2030 0d0a 0d0a              ength: 0....
-----------------------------------

I am interested only in the ASCII part of the traffic, possibly put on one line; how can I configure snoop to have it this way?
0
Emanuele_Ciriachi
Asked:
Emanuele_Ciriachi
1 Solution
 
enyamadaCommented:

Hi,

Snoop doesn't offer any embedded option to do what you want.  The solution is to send the output to a file or pipe
and make a shell script.

hth
0
 
pjedmondCommented:
OK - this possibly a job for sed:

snoop -d bge2 -x54 -ta host 192.168.104.152 | sed -e 's/ *//' | sed -e 's/.*  //' | sed -e :a -e '/.$/N; s/\n//; ta'

Lets explain:

sed -e 's/ *//'

substitutes all the leading spaces for nothing, effectively stripping them off.

sed -e 's/.*    //'

is a substitution whereby everything up to to a 4 space block is substituted with nothing. Effectively, this removes all of the binary data

sed -e :a -e '/.$/N; s/\n//; ta'

can possibly be improved, but basically this adds the following line to the one before (when it ends in anything).

Obviously, this is not that easy to remember, and requires a bit of typing each time, which I suspect you do not want to do, therefore:

alias wibble="sed -e 's/ *//' | sed -e 's/.*  //' | sed -e :a -e '/.$/N; s/\n//; ta'

and then you can:

snoop -d bge2 -x54 -ta host 192.168.104.152 | wibble

HTH:)

0
 
pjedmondCommented:
Depending on the exact chars your command outputs, you may need to alter the commands above (particularly number and location of spaces!), hence the explainations!

HTH:)
0
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pjedmondCommented:
Better still, put the alias command in your ~/.bashrc file, then it is automatically run each time you log in:)
0
 
TintinCommented:
Why are you using -x54 if you want a "readable" format?  What are you actually trying to capture and how do you want to read it?

I find the easiest way is to capture in snoop and read in the capture file in Etherreal.
0
 
Emanuele_CiriachiAuthor Commented:
Thanks for all the great suggestions. I am not in the test lab today so cannot try it out, will let you know.
0

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